<style type="text/css">
  body {
	padding-top: 40px;
	padding-bottom: 40px;
	background-color: #f5f5f5;
  }
</style>
<p>
<%= form_tag(signin_path, :class => 'form-signin') do %>
  <h2 class="form-signin-heading">Please sign in</h2>
  <%= text_field_tag :username, params[:username], {:placeholder => "Username", :class => "input-block-level"} %>
  <%= password_field_tag :password, params[:password], {:placeholder => "Password", :class => "input-block-level"} %>
  <button class="btn btn-large btn-primary" name="login" type="submit">Sign in</button>
<% end %>
</p>